Symbols are objects, characters, figures, or colors used to represent abstract ideas or concepts.
The boar is Richard’s heraldic symbol, and is used several
times throughout the play to represent him, most notably in Stanley’s dream
about Hastings’s death. The idea of the boar is also played on in
describing Richard’s deformity, and Richard is cursed by the duchess
as an “abortive, rooting hog” (I.iii.